Hi The same board with all the logic crud on it has the 10 MHz signal amps on it. Same supply / same ground for it all. There very much is a practical limit here.
Bob On Feb 15, 2011, at 4:47 AM, Magnus Danielson wrote: > On 02/15/2011 04:18 AM, Charles P. Steinmetz wrote: >> Bob wrote: >> >>> If all you are doing is running a Thunderbolt, you don't need a supply >>> that's more quiet than most batteries. >> >> Most batteries are *very* quiet -- it takes heroic measures to get *any* >> actively regulated supply into that ballpark. Indeed, one might be >> tempted to run a Tbolt off of three batteries, each one charged by a >> low-noise, high-impedance current source that puts out about .05 CV more >> than the Tbolt draws. One could even turn the charging off for short >> periods of "minimal noise" operation, if the batteries were suitably >> sized. However, in either case I would be concerned that the drift of >> one or more of the battery voltages (poor absolute regulation) might >> introduce another source of XO drift -- but I have not tried it. > > This has gone overboard. The T-bolt generates digital noise all by itself. > It's the OCXO which would benefit most from a clean supply and isolation from > the rest of the T-bolt except that temp-sensor. > > Providing ultra-clean supplies to the digital logic would be overkill, as it > would mess it up itself anyway. > > Cheers, > Magnus > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
